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What is mullite

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  • Time of issue:2020-08-04 17:41
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(Summary description)Mullite is a high-quality refractory material. It has the characteristics of uniform expansion, excellent thermal shock stability, high load softening point, small high temperature creep value, high hardness, and good chemical resistance. There are mainly high-purity fused mullite, ordinary fused mullite, all-natural bauxite concentrate sintered mullite and light burned mullite. Mullite AI203-SI02 is the only stable binary compound under normal pressure. Chemical formula A1xSi2-xO5.5-0.5x density; 3.16g/cm3 Mohs hardness; 6-7 refractoriness: 1800C is stable and 1810C is decomposed into corundum and liquid phase

What is mullite

(Summary description)Mullite is a high-quality refractory material. It has the characteristics of uniform expansion, excellent thermal shock stability, high load softening point, small high temperature creep value, high hardness, and good chemical resistance. There are mainly high-purity fused mullite, ordinary fused mullite, all-natural bauxite concentrate sintered mullite and light burned mullite. Mullite AI203-SI02 is the only stable binary compound under normal pressure. Chemical formula A1xSi2-xO5.5-0.5x density; 3.16g/cm3 Mohs hardness; 6-7 refractoriness: 1800C is stable and 1810C is decomposed into corundum and liquid phase

  • Categories:Trade News
  • Author:
  • Origin:
  • Time of issue:2020-08-04 17:41
  • Views:
Information

Mullite is a high-quality refractory material. It has the characteristics of uniform expansion, excellent thermal shock stability, high load softening point, small high temperature creep value, high hardness, and good chemical resistance. There are mainly high-purity fused mullite, ordinary fused mullite, all-natural bauxite concentrate sintered mullite and light burned mullite. Mullite AI203-SI02 is the only stable binary compound under normal pressure. Chemical formula A1xSi2-xO5.5-0.5x density; 3.16g/cm3 Mohs hardness; 6-7 refractoriness: 1800C is stable and 1810C is decomposed into corundum and liquid phase.

Mullite is rosy or blue when it contains impurities. Orthogonal crystal system, into columnar or needle-shaped crystals. The melting temperature is about 1910°C. It is generated when calcining clay, high alumina raw materials (such as kyanite, andalusite, sillimanite) and ceramics. It is the main component of clay bricks, high alumina bricks and porcelain.

Mullite is a high-quality refractory material, mainly including high-purity fused mullite, ordinary fused mullite, all-natural bauxite concentrate sintered mullite and light burnt mullite.

High-temperature mullite thermal insulation brick is a new technology introduced in China, the latest domestic energy-saving refractory material, which has the characteristics of high temperature resistance, high strength, low thermal conductivity, and significant energy saving effect.

Mullite, sintered steel jade bricks, zircon bricks, silicon carbide products, corundum and mullite are a high-quality refractory raw material, mullite expansion is uniform, mullite has excellent thermal shock stability, mullite The load softening point is high, the high temperature creep value of mullite is small, the hardness of mullite is large, and the chemical corrosion resistance of mullite is good.

Mullite is mainly used in refractory materials, ceramics, metallurgy, casting, electronics and other industries. It is suitable for the lining of petroleum cracking furnaces, metallurgical hot blast furnaces, ceramic roller kilns, tunnel kilns, electric porcelain drawer kilns, glass crucible kilns and various electric furnaces. It can be directly contacted with the flame and tested and used by relevant technical supervision departments. Technical indicators of similar foreign products.

Fiber porous ceramics, binders, mullite precursor colloids, mullite nanocrystals Introduction Mullite has good properties, such as high melting point, small expansion, good thermal shock resistance, low true specific gravity, and creep resistance High and good chemical stability. The porous material made of mullite fiber has the advantages of high porosity, light weight, low thermal conductivity, high permeability, non-brittleness, etc., has a wide range of application prospects, and will have great applications in chemical, metallurgy, environmental protection and other fields The social and economic significance of

In fiber porous ceramics, pores are formed between fibers, and the contact points between the fibers are connected by a binder. Therefore, the firmness of the binder bond is essential for fully exerting the excellent performance of the ceramic fiber substrate and the final use performance of the product. Plays a decisive role. Considering that the base material of the molded porous ceramic used is mullite fiber, such as using a binder that is mullite crystal phase after sintering, because it has the same crystal phase and microstructure as mullite fiber and consistent thermal expansion Coefficient, so that the molded porous ceramic has better performance. This paper analyzes and studies the preparation process and structure of mullite crystallites used for bonding of mullite fiber porous ceramics.

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